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Ceramsite sand and production process thereof

A technology of ceramsite sand and ceramsite, which is applied in the field of ceramsite sand, can solve the problems that the mullite crystal phase cannot be uniformly distributed, the mullite crystal phase cannot be formed, and the performance of the ceramsite sand is affected, so as to increase the compactness , reduce density, improve roundness and uniformity

Active Publication Date: 2019-07-05
郑州市新郑梅久实业有限公司
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Problems solved by technology

[0003] At present, the patent application document with the application publication date of 2018.12.18 and the application publication number of CN109020607A discloses a dust removal ash ceramsite sand and its preparation method and application, wherein the ceramsite sand raw materials include dust removal ash, cement, VAE rubber powder, Silica fume, the dust-removing ash ceramsite sand is mixed with water, granulated, and roasted to obtain ceramsite sand whose crystal phase is mainly mullite, so that it has high temperature resistance and good thermal stability. During the firing process of ceramsite sand, it is easy for ceramsite sand to fail to form mullite crystal phase due to uneven heating, or the formed mullite crystalline phase cannot be evenly distributed in ceramsite sand, thus affecting the quality of ceramsite sand. performance

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  • Ceramsite sand and production process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of ceramsite sand, its raw material ratio is shown in Table 1;

[0044] (1) Coarse crushing, fine crushing, and cone crushing of coal gangue, mullite, kaolin, and bauxite, respectively, for standby;

[0045] (2) Mix the coal gangue, mullite, kaolin, and bauxite after cone crushing evenly, and carry out ball milling and powder selection to obtain a raw material mixture;

[0046] (3) making the water form atomized water, and adding the atomized water into the raw material mixture to granulate, the amount of water added is 5% of the total weight of the raw material mixture, and then sieving to obtain a semi-finished product;

[0047] (4) heat preservation at 120°C for 1h, then roast at 1000°C for 1h, then roast at 1300°C for 1h, cool down and sieve to obtain the ceramsite body, That is, the ceramsite sand is obtained, and the particle size of the ceramsite sand is a continuous particle size of 7-14 mm.

[0048]Among them, the granulation is prepared by the followi...

Embodiment 2

[0050] A kind of ceramsite sand, its raw material ratio is shown in Table 1;

[0051] (1) Coarse crushing, fine crushing, and cone crushing of coal gangue, mullite, kaolin, and bauxite, respectively, for standby;

[0052] (2) Mix the coal gangue, mullite, kaolin, and bauxite after cone crushing evenly, and carry out ball milling and powder selection to obtain a raw material mixture;

[0053] (3) making the water form atomized water, and adding the atomized water into the raw material mixture for granulation, the amount of water added is 12% of the total weight of the raw material mixture, and then sieving to obtain a semi-finished product;

[0054] (4) Keep the temperature at 112°C for 1.7h, then at 930°C for 1.3h, then at 1230°C for 1.2h, cool down and sieve to obtain the pottery Grain body, that is, get ceramsite sand, the particle size of ceramsite sand is a continuous particle size of 2-4mm.

[0055] Among them, the granulation is prepared by the following method: the wa...

Embodiment 3

[0057] A kind of ceramsite sand, its raw material ratio is shown in Table 1;

[0058] (1) Coarse crushing, fine crushing, and cone crushing of coal gangue, mullite, kaolin, and bauxite, respectively, for standby;

[0059] (2) Mix the coal gangue, mullite, kaolin, and bauxite after cone crushing evenly, and carry out ball milling and powder selection to obtain a raw material mixture;

[0060] (3) Make the water form atomized water, and add the atomized water into the raw material mixture for granulation, the amount of water added is 10% of the total weight of the raw material mixture, and then sieve to obtain a semi-finished product;

[0061] (4) Under the condition of 115°C, heat preservation for 1.5h, then under the condition of 950°C, roast for 1.5h, then under the condition of 1250°C, roast for 1.5h, cool down and sieve to obtain the pottery Grain body, that is to get ceramsite sand, the particle size of ceramsite sand is a continuous particle size of 4-7mm.

[0062] Amon...

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Abstract

The invention relates to a ceramsite sand and a production process thereof, and belongs to the technical field of ceramsite sands. The ceramsite sand comprises a ceramsite body, the ceramsite body isprepared from components including coal gangue, mullite, kaolin and bauxite, the raw materials are crushed, mixed and ball-milled, then atomized water is added for mixing and granulation, drying and calcination are carried out, and therefore the ceramsite body is obtained. According to the ceramsite sand, the mullite is directly added to the raw materials for mixing, so that the mullite is more uniformly distributed in the ceramsite sand, the preparation of the ceramsite sand is simpler, and the high temperature resistance and thermal stability of the ceramsite sand are improved; meanwhile, bymeans of the production process of the ceramsite sand, the raw materials are subjected to three-stage crushing and ball milling, the particle size of the raw materials is reduced, and the strength ofthe ceramsite sand is improved; by mixing and granulating the atomized water and the raw material mixture, the roundness and uniformity of the ceramsite sand are improved; by adopting two-stage calcination, the stability and performance of the ceramsite sand are improved.

Description

technical field [0001] The invention relates to the technical field of ceramsite sand, more specifically, it relates to ceramsite sand and its production process. Background technique [0002] Ceramsite sand is made of various raw materials such as clay, slate, shale, coal gangue and industrial solid waste through ceramic sintering. Ceramsite sand has the advantages of low density, low water absorption, good thermal insulation and good frost resistance. [0003] At present, the patent application document with the application publication date of 2018.12.18 and the application publication number of CN109020607A discloses a dust removal ash ceramsite sand and its preparation method and application, wherein the ceramsite sand raw materials include dust removal ash, cement, VAE rubber powder, Silica fume, the dust-removing ash ceramsite sand is mixed with water, granulated, and roasted to obtain ceramsite sand whose crystal phase is mainly mullite, so that it has high temperatu...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B38/00C04B41/87
CPCC04B33/1324C04B38/009C04B41/5031C04B41/87C04B2235/3217C04B2235/3463C04B2235/656C04B2235/6567C04B2235/96C04B41/4535C04B41/0072Y02P40/60
Inventor 陈厚发段运明宋彦佩王子雨崔梦迪李宏岐
Owner 郑州市新郑梅久实业有限公司
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